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仇宇霞,秦忠国,张峰,等. 含刚性抗滑桩的土质边坡三维稳定性分析[J]. 科学技术与工程, 2020, 20(16): 6593-6598.
QIU Yuxia,张峰,et al.3D Stability Analysis of Soil Slope with Rigid Anti-slide Pile[J].Science Technology and Engineering,2020,20(16):6593-6598.
含刚性抗滑桩的土质边坡三维稳定性分析
3D Stability Analysis of Soil Slope with Rigid Anti-slide Pile
投稿时间:2019-09-30  修订日期:2020-02-22
DOI:
中文关键词:  强度折减法 抗滑桩 稳定安全系数 非均质土
英文关键词:strength reduction method anti-slide pile stability safety factor the heterogeneous soil
基金项目:
           
作者单位
仇宇霞 河海大学力学与材料学院
秦忠国 河海大学力学与材料学院
张峰 河海大学力学与材料学院
丁灵龙 河海大学力学与材料学院
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中文摘要:
      抗滑桩是常用的边坡加固方法,但由于桩-土相互作用的复杂性,难以用经典方法计算边坡稳定性和桩位、桩长、桩距。本文采用强度折减法,对抗滑桩加固的三维非均质边坡进行弹塑性分析和破坏过程模拟,得出边坡的稳定安全系数和潜在滑动面,在此基础上进一步研究了桩位和桩长、桩距对边坡稳定的影响。研究表明:在潜在滑动面进行布桩时,抗滑桩与坡脚间水平距离为未加固边坡潜在滑动面水平距离的两倍时,稳定安全系数达到最大;在1号桩位下布桩时,抗滑桩锚固深度宜为2/3桩长;三维稳定性分析能有效观察到排桩间的土拱效应,当桩间距为4倍桩径时,此时桩间土拱起到了较好的阻滑作用。
英文摘要:
      Anti-slide pile is a commonly used method for slope reinforcement. It is difficult to calculate slope stability, pile location, pile length and pile spacing by classical method because of the complexity of pile-soil interaction. The strength reduction method is used to analyze the elastic-plastic behavior of the 3D heterogeneous slope strengthened by anti-slide piles and simulate the failure process. The stability safety factor and potential sliding surface of the slope are obtained. On this basis, the influence of pile position, pile length and pile spacing on the stability of the slope is further studied. Some important conclusions are drawn according to the research results to guide the engineering practice and amend the design code for stabilizing piles, which include:The maximum safety factor of stability can be obtained when the piles are inserted in where the horizontal distance between anti-sliding pile and foot of slope is twice the horizontal distance of potential sliding surface’s depth without reinforcement, rather than the top ,middle or the toe of the slope. The optimum stabilizing depth for the pile in heterogeneous soils can be chosen to be 2/3 pile length when laying piles under the No. 1 pile position. The 3D stability analysis can effectively observe the soil arching effect between rows of piles. The soil arching plays a better role in preventing sliding when the pile spacing is 4 times the diameter of piles.
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